miniCart Payment Security

miniCart is intended for a small, low traffic, online shop, where orders will be individually inspected. The problem is, someone with a knowledge of JavaScript, may be able to inject some malicious code into the script to change the product price, before that data gets to the payment processing provider. This limitation is common to all client-side only, javascript based, shopping carts, as no amount of clever coding or obfuscating can completely secure javascript from being altered.